Displaying Phase Noise Parameters

 

Trace Measurement Parameters

How to select and configure Measurement Parameters

Using Hardkey/SoftTab/Softkey

Using a mouse

  1. Press Trace > Trace Setup >  Measure....

  2. Select a parameter.

  1. Click Instrument.

  2. Select Trace.

  3. Select Measure....

  4. Select a parameter

 

Measure Dialog help

 

PN - Integrated phase noise measured

AM - Amplitude modulation measured.  This parameter measures the percentage of the modulation of the carrier.

PM+AM - Sum of Integrated phase noise and  Amplitude modulation

L(f) - Single sideband phase noise (same as PN), dBc/Hz

Sphi(f) - Spectral density of phase fluctuation, dB/Hz

Sv(f) - Square root of Spectral density of frequency fluctuations, Hz/sqrt(Hz)

Sy(f) - Square root of Spectral density of fractional frequency fluctuations, 1/sqrt(Hz)

AVAR - Allan Variance

ADEV - Allan Deviation

Note: The input receiver number can be changed using the RF Path tab

 

New Trace - Add a new trace.

Channel N - Select a channel number for the new modulation distortion trace.

Window N - Select to create the new trace in an existing window or new window.

Select All - Select all measurement parameters.

 

 

Quick Trace

Quick Trace shows an interim result during cross correlation.  When the cross correlation factor is a large number, the calculation takes long time. This allows you to notice an incorrect setup earlier.

When the Quick Trace is set at Off (default is Off). The traces are updated only after cross correlation calculation is finished. Quick trace may show strange result for an instant if you measure a noisy signal.